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On Tue, Nov 12, 2019 at 05:35 AM, Rune Broberg wrote: New chart type: Permeability

Rune, I found a very good use for the permeability function today. I have a ferrite core samples kit from Amidon that I acquired years ago. Somehow the 4 BN61-202 devices had become mixed with the 4 BN73-202 devices and I needed to know which was which. I ran the permeability curves on one and the curves didn't cross below 30 MHz so I assumed it was 61 material. The next test curves crossed at about 4 MHz so I assumed it was 73 material. So I was able to separate the 61 material from the 73 material in nothing flat. Thanks very much for this very useful enhancement.

Hi all

I have just got my unit and it works well but I am looking for the best software (for Ham Radio) to use on my Android phone and tablet?

I have nanoVNAPartner and nanovna-saver-v0.2.0 and was looking for something like this for my tablet.

What would be your suggestions please?

Thanks - 73

Les - M0LPB
====================================

Les,

You could try:



but I can't say whether it's the "best" for you.

73
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

Thanks a lot.

Jean

I have also used a regular microUSB cable with an inexpensive microUSB to USB Type -C converter. Worked okay.

Excellent!? Thank You.??

Do you want to add it to the Files section or let Oristo add it? and update the Wiki.

Also NanoVNA-Q firmware has si5351 status checking, so if there is a problem, you will see PLL indicator on the screen.
And also it allows to pause sweep and connect NanoVNA to PC and read paused sweep with no need to reset device.

Some of NanoVNA-Q features was added to NanoVNA-H_20191125.

Gyula's document formatted for letter size and in PDF.

strange that you still didn't know that.
Some NanoVNA-Q fixes even used in NanoVNA-H firmware.

It has fixed frequency rounding errors, and multithreading issues.
Also it provides additional features, such as:
- improved gain control for NanoVNA-H devices
- better battery indicator
- vbat_offset command for battery voltage calibration
- color command for configure custom colors
- scanraw command for raw measurements with unlimited point count
- impedance label which shows complex impedance for current marker position
- more precise data transfer from NanoVNA to PC
- average mode which allows to perform more precise calibration and get less noisy measurements
- a couple of bug fixes and improvements

but who is NanoVNA-Q ?? Where did he come from ?

NanoVNA-Q is alternative firmware for NanoVNA-H device

OK, I see NanoVNA-F, NanoVNA-H, plain vanilla NanoVNA,
but who is NanoVNA-Q ?? Where did he come from ?

The good news is, there are 23 more letters available !!

73, Dick, W1KSZ
________________________________
From: [email protected] <[email protected]> on behalf of QRP RX <qrp.ddc@...>
Sent: Tuesday, November 26, 2019 9:45 AM
To: [email protected] <[email protected]>
Subject: [nanovna-users] NanoVNA-Q firmware update 0.4.4 #nanovna-q

NanoVNA-Q 0.4.4 released:


Added average mode which allows to reduce measurement noises.
Very useful for calibration.

NanoVNA-Q 0.4.4 released:


Added average mode which allows to reduce measurement noises.
Very useful for calibration.

Hi Jean,

this afternoon i thought i was doing a table, i hope you thought so.

OK thanks, I will have a go with that one, I was hopping there was others. Thanks anyway, I need to play with it and see what it does.

Sent from Mail ( ) for Windows 10

*From:* Larry Rothman ( nlroth@... )
*Sent:* 26 November 2019 15:51
*To:* [email protected]
*Subject:* Re: [nanovna-users] Software for Anroid

Go to the Play store and search for nanovna.

You'll find the only app available - but make sure your android device supports USB OTG and you have an OTG cable.

Hi all

I have just got my unit and it works well but I am looking for the best software (for Ham Radio) to use on my Android phone and tablet?

I have nanoVNAPartner and nanovna-saver-v0.2.0 and was looking for something like this for my tablet.

What would be your suggestions please?

Thanks - 73

Les - M0LPB

Go to the Play store and search for nanovna.
You'll find the only app available - but make sure your android device supports USB OTG and you have an OTG cable.

I built a fixture to make it easy to test through-hole and SMT parts



You can use the ZIF socket with resistance as calibration standards and it
works well up into the UHF.

Dan

On Mon, Nov 25, 2019 at 8:08 PM Bob Albert via Groups.Io <bob91343=
[email protected]> wrote:

I connected a piece of coax to the nano and, at the far end, connected
first a resistor, then a capacitor, then an inductor. I read the nano
screen in all three cases and the value indicated was within about one
percent of what my lab quality gear measured. It's an amazing device,
really. As I raise the frequency, the reading changes (always putting the
marker at the cable end). So it's good to see, for example, how an
ordinary resistor behaves at rf. I should try a resistor and reactance in
series and see how it separates them. I will try a resonant circuit as
well so I can read the resonant frequency and maybe Q. It might work to
check crystals as well. As you know, the frequency accuracy is better than
1 ppm.

The range over which it's accurate isn't too great but for most
measurements it's entirely adequate. The signal level is around -10 dBm,
about 1/10 milliwatt, not enough to damage parts.

I have already measured cable length but that's a lot of trouble; cable
attenuation is very easy to read. Next I will see how it measures
characteristic impedance of coax. As an antenna analyzer it's very good
but it has many more uses than that.

I might see if I can calibrate it as an rf voltmeter.

I have already gotten my money's worth out of it.

Hi All
I have update my calibration document for male and female calibration.
I have added a set of screen copies how to set the calibrations for
NanoVNA-saver to compensate for the problem Rune made clear recently, that a
open C0 of 0 fF was illegal.
So now it works perfectly with the settings described.
The updated document attached and also available from the link
and female calibration NanoVNA-H.pdf
<>


Kind regards

Kurt

What app would Sam run on the iPad though?
I can only think of a terminal to access the console commands.

Yes, hardware support is prerequisite

Are there VNA iPad apps? (Haven't looked)

Sadly, iOS web browsers do not support webUSB apps,
and there are seemingly no free VNA apps,
and I find only one commercial (FieldFox) app


However, Python is supported on iOS, and scikit-rf apps exist..










.. as does Jupyter Notebook, e.g.



Related:

What app would Sam run on the iPad though?I can only think of a terminal to access the console commands.
Are there VNA iPad apps? (Haven't looked)